<template>
    <div >
    <div class="upload">
      <div class="upload_warp">
        <div class="upload_warp_left"  @click="fileClick">
        <!-- //静态上传图片 -->
           <img src="../assets/img/upload.png"> 
        </div>
      </div>
      <!-- 展示容量div -->
      <div class="upload_warp_text">
        选中{{imgList.length}}张文件，共{{bytesToSize(this.size)}}
      </div>
      <!-- 上传文件input做隐藏 -->
      <input  type="file" ref='upload_file' id="upload_file"  @change="fileChange($event)" multiple style="display:block"/>
      <!-- 展示图片div -->
      <div class="upload_warp_img" v-show="imgList.length!=0">
         <!-- 一个图片 -->
        <div class="upload_warp_img_div" v-for="(item,index) of imgList">
          <div class="upload_warp_img_div_top">
            <div class="upload_warp_img_div_text">
               {{item.file.name}}
               <!-- <br/>{{item.file.size}}<br/>{{item.file.src}} -->
            </div>
            <!-- 删除功能 -->
             <img src="../assets/img/del.png" class="upload_warp_img_div_del" @click="fileDel(index)" >
          </div>
          <!-- <h1>{{item.file.src}}</h1> -->
           <img :src="item.file.src"> 
        </div>
      </div>
    </div> 
     <!-- <button @click="submit">显示</button> -->
    <!-- <h3>{{ imgList[0]}}</h3>  -->
    
  </div>
</template>

<script>
// import store from '../../assets/store/store.js'
    export default({
        data(){
            return {
               imgList: [],
                size: 0,
                // file:''
            }
        },
        methods:{
            // 点击触发上传事件
             fileClick() {
              document.getElementById('upload_file').click();
              console.log(111);
              console.log(this.imgLis);
            //   将上传图片保存到仓库
              this.$store.state.imgList=this.imgList;
          },

          fileChange(el) {
              if (!el.target.files[0].size) return;
              // console.log(el.target.files);
              this.fileList(el.target);
              el.target.value = ''
            //   console.log(222);
          },
          fileList(fileList) {
              let files = fileList.files;
               console.log(files);
              for (let i = 0; i < files.length; i++) {
                  //判断是否为文件夹
                  //  console.log(333);
                  if (files[i].type != '') {
                      this.fileAdd(files[i]);
                  } else {
                      //文件夹处理
                      this.folders(fileList.items[i]);
                  }
              }
          },
          //文件夹处理
          folders(files) {
              let _this = this;
              //判断是否为原生file
              if (files.kind) {
                  files = files.webkitGetAsEntry();
              }
              files.createReader().readEntries(function (file) {
                  for (let i = 0; i < file.length; i++) {
                      if (file[i].isFile) {
                          _this.foldersAdd(file[i]);
                      } else {
                          _this.folders(file[i]);
                      }
                  }
              })
          },
          foldersAdd(entry) {
              let _this = this;
            //    console.log(444);
              entry.file(function (file) {
                  _this.fileAdd(file)
              })
          },
          fileAdd(file) {
              //总大小
              console.log(file);
              // 将图片文件放进数组保存在仓库里
              this.$store.state.file=this.imgList;
              // console.log(this.$store.state.file);
              // console.log(this.imgList);
              // 判断仓库里的file是否为数组
              // console.log(Array.isArray(this.$store.state.file));
              this.size = this.size + file.size;
              //判断是否为图片文件
               
              if (file.type.indexOf('image') == -1) {
                  file.src = 'wenjian.png';
                  this.imgList.push({
                      file
                  });
                  console.log(this.imgList);
              } else {
                  let reader = new FileReader();
                //   console.log(reader);
                //   console.log(this);
                  reader.vue = this;
                //   console.log(reader.vue._uid);
                //   console.log(reader.readAsDataURL);
                  reader.readAsDataURL(file);
                  reader.onload = function () {
                      file.src = this.result;
                      this.vue.imgList.push({
                          file
                      });
                        // console.log(5552);
                  }
              }
          },
        //   删除图片
          fileDel(index) {
            //    console.log(666);
              this.size = this.size - this.imgList[index].file.size;//总大小
              this.imgList.splice(index, 1);
          },
          bytesToSize(bytes) {
            //    console.log(777);
              if (bytes === 0) return '0 B';
              let k = 1000, // or 1024
                  sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'],
                  i = Math.floor(Math.log(bytes) / Math.log(k));
              return (bytes / Math.pow(k, i)).toPrecision(3) + ' ' + sizes[i];
          },
        },
        mounted() {
             
        },
    })
</script>

<style>
    .upload_warp_img_div_del {
      position: absolute;
      top: 6px;
      width: 16px;
      right: 4px;
    }

    .upload_warp_img_div_top {
      position: absolute;
      top: 0;
      width: 100%;
      height: 30px;
      background-color: rgba(0, 0, 0, 0.4);
      line-height: 30px;
      text-align: left;
      color: #fff;
      font-size: 12px;
      text-indent: 4px;
    }

    .upload_warp_img_div_text {
      white-space: nowrap;
      width: 80%;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .upload_warp_img_div img {
      max-width: 100%;
      max-height: 100%;
      vertical-align: middle;
    }

    .upload_warp_img_div {
      position: relative;
      height: 100px;
      width: 95px;
      border: 1px solid #ccc;
      margin: 0px 10px 10px 0px;
      float: left;
      line-height: 100px;
      display: table-cell;
      text-align: center;
      background-color: #eee;
      cursor: pointer;
    }

    .upload_warp_img {
      border-top: 1px solid #D2D2D2;
      padding: 14px 0 0 14px;
      overflow: hidden
    }

    .upload_warp_text {
      text-align: left;
      margin-bottom: 10px;
      padding-top: 10px;
      text-indent: 14px;
      border-top: 1px solid #ccc;
      font-size: 14px;
    }

    .upload_warp_right {
      float: left;
      width: 57%;
      margin-left: 2%;
      height: 100%;
      border: 1px dashed #999;
      border-radius: 4px;
      line-height: 130px;
      color: #999;
    }

    .upload_warp_left img {
      margin-top: 32px;
    }

    .upload_warp_left {
      float: left;
      width: 40%;
      height: 100%;
      border: 1px dashed #999;
      border-radius: 4px;
      cursor: pointer;
    }

    .upload_warp {
      margin: 14px;
      height: 130px;
    }

    .upload {
      border: 1px solid #ccc;
      background-color: #fff;
      width: 100%;
      box-shadow: 0px 1px 0px #ccc;
      border-radius: 4px;
    }

    /* .hello {
      width: 650px;
      margin-left: 34%;
      text-align: center;
    } */
</style>

